Question 1

Why is the filamentous morphology of the water moulds considered a case of convergent evolution?

Accepted Answer

A)  Water moulds evolved from filamentous fungi.
B)  Body shape reflects ancestor-descendant relationships among organisms.
C)  In both cases, filamentous shape is an adaptation for the absorptive nutritional mode of a decomposer.
D)  Filamentous body shape is evolutionarily ancestral for all eukaryotes.
E)  Both the first and second responses above are correct.F) C) and D)
G) C) and E)

Question 2

The following questions refer to the description below.
You and a friend were walking through a pet store looking at the different aquaria with fish. Most of the aquaria had fish that were healthy and colourful, but two tanks with many fish in them had fish with "fin and tail rot" caused by a pathogenic bacteria. You and your friend read that bacteria are found in most environments and that healthy fish are quite resistant to bacterial infections.
 
-Test tube 3 contains

Accepted Answer

A)  Paramecium.
B)  Navicula (diatom) .
C)  Pfiesteria (dinoflagellate) .
D)  Entamoeba.
E)  Plasmodium.F) A) and D)
G) All of the above

Question 3

Which of the following was derived from an ancestral cyanobacterium?

Accepted Answer

A)  chloroplast
B)  mitochondrion
C)  hydrogenosome
D)  mitosome
E)  Two of the responses above are correct.F) A) and E)
G) B) and E)

Question 4

Living diatoms contain brownish plastids. If global warming causes blooms of diatoms in the surface waters of Earth's oceans, how might this be harmful to the animals that build coral reefs?

Accepted Answer

A)  The coral animals, which capture planktonic organisms, may be outcompeted by the diatoms.
B)  The coral animals' endosymbiotic dinoflagellates may get "shaded out" by the diatoms.
C)  The coral animals may die from overeating the plentiful diatoms, with their cases of silica.
D)  The diatoms' photosynthetic output may over-oxygenate the water.E) B) and C)
F) A) and B)

Exam 28: Protists

Why is the filamentous morphology of the water moulds considered a case of convergent evolution?

Correct Answer
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Which of the following was derived from an ancestral cyanobacterium?

Correct Answer
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Correct Answer
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Living diatoms contain brownish plastids. If global warming causes blooms of diatoms in the surface waters of Earth's oceans, how might this be harmful to the animals that build coral reefs?

Correct Answer
verified

Exam 28: Protists

Why is the filamentous morphology of the water moulds considered a case of convergent evolution?

Correct AnswerverifiedShow Answer

Which of the following was derived from an ancestral cyanobacterium?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Living diatoms contain brownish plastids. If global warming causes blooms of diatoms in the surface waters of Earth's oceans, how might this be harmful to the animals that build coral reefs?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified